High-temperature resistance (up to 200°C) and chemical corrosion resistance, ideal for harsh environments with acids/alkalis or fuels.
Application Scenario of TG Oil Seal
Automotive Industry
Transmissions, differentials, hub bearing seals.
Industrial Equipment
Pumps/valves, gearboxes, hydraulic cylinders.
Agricultural Machinery
Tractors, harvesters, drive systems.
How to Select a TG Oil Seal
When selecting a TG oil seal, the following key factors need to be considered:
1. Dimensional Specifications
Inner Diameter: Precisely measure the diameter of the shaft on which the oil seal will be installed. The inner diameter of the TG oil seal should fit closely with the shaft diameter. Usually, a size equal to or slightly smaller than the shaft diameter is chosen to ensure that the lip of the oil seal has a good gripping force on the shaft, achieving reliable sealing.
Outer Diameter: Determine it according to the diameter of the installation cavity. Generally, the diameter of the cavity is slightly larger than the outer diameter of the oil seal, so that the oil seal can be installed smoothly and remain stable within the cavity. This prevents situations where the outer diameter of the oil seal is too large to be installed or too small, resulting in poor sealing.
Width: Select an appropriate width based on the installation space and specific sealing requirements. A wider oil seal usually provides better sealing performance and stability but requires a larger installation space. A narrower oil seal is suitable for situations with limited space but may have slightly inferior sealing effectiveness.
2. Material Properties
Nitrile Butadiene Rubber (NBR): It has good oil resistance, wear resistance, and anti-aging properties. It can maintain good elasticity and sealing performance within a certain temperature range. Generally, it is suitable for environments with a working temperature of about -40°C to 120°C. It is a commonly used material for TG oil seals and is widely applied in various ordinary oil lubrication systems.
Fluororubber (FKM): It has excellent high-temperature resistance, chemical corrosion resistance, and oil resistance. It can withstand high temperatures ranging from -20°C to 200°C. It performs outstandingly in some occasions with high sealing requirements and harsh working environments, such as when in contact with strong acids and alkalis, high-temperature hot oil, and other media. It is often used for sealing in automotive engines, chemical equipment, and other fields.
3. Working Conditions
Temperature: Select an oil seal made of a suitable material according to the actual working temperature of the equipment. If the working environment temperature is high, a TG oil seal made of a high-temperature-resistant material such as fluororubber should be prioritized. If the temperature is low, an oil seal with good low-temperature resistance, such as silicone rubber, needs to be considered to prevent the oil seal from hardening and becoming brittle at low temperatures and losing its sealing effect.
Pressure: TG oil seals are generally suitable for low-pressure environments, usually with a working pressure below 0.5MPa. When the pressure is high, a specially designed oil seal model for high pressure should be selected, or measures such as adding auxiliary sealing devices should be taken to avoid the oil seal from being extruded or damaged under high pressure, which would affect the sealing performance.
Rotational Speed: The rotational speed of the shaft has an important impact on the selection of the oil seal. High rotational speeds will cause the oil seal to generate a large amount of frictional heat. Therefore, an oil seal material and structure with good heat dissipation performance and strong wear resistance need to be selected. For example, for shafts with high rotational speeds, a fluororubber oil seal can be selected, and it is ensured that the lip design of the oil seal can adapt to high-speed rotation to reduce wear and heat accumulation and extend the service life of the oil seal.
4. Sealing Medium
Different oil seal materials have different adaptabilities to different media. For example, nitrile butadiene rubber has good tolerance to common oils such as mineral oils and hydraulic oils but has weak resistance to certain organic solvents or strong acids and alkalis. Fluororubber, on the other hand, has excellent corrosion resistance to most chemical media. Therefore, select an appropriate oil seal material according to the specific sealing medium to ensure that the oil seal will not experience swelling, hardening, embrittlement, or corrosion during long-term contact with the medium, thus ensuring the reliability of the seal.
5. Installation Requirements
Installation Space: When selecting a TG oil seal, fully consider the size of the installation space. Ensure that the size and structure of the selected oil seal can be installed smoothly within the given space and that the oil seal will not be deformed or incorrectly installed due to space limitations. If the installation space is narrow, a thin or specially structured oil seal may be required.
Installation Method: Understand the installation method of the oil seal and the required installation tools. Some TG oil seals may require special installation methods, such as using a dedicated installation fixture or following specific installation steps, to ensure that the oil seal is installed correctly and to avoid damaging the oil seal during the installation process, which would affect its sealing performance.
6. Brand and Quality
Give priority to well-known brands and reliable quality TG oil seal products. Well-known brands usually have strict standards and specifications in aspects such as material procurement, production process control, and quality inspection, and can provide oil seal products with stable quality and reliable performance. Their sealing effect and service life are more guaranteed. You can refer to the usage evaluations and experiences of other users, or consult professional mechanical engineers and suppliers to select brands with a good reputation and product models suitable for specific applications.
